Register-lock.



RAP.

REGISTER LOCK. APPLICATION men "8.6.19ll.

YNESSES UNITED STATES PATENT OFFICE.

HARRY A. FOOTHORAP, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR T0 ELLIOTT- FISHER COMPANY, OF HARRISBURG, PENNSYLVANIA, A CORPORATION OF DELAWARE.

REGISTER-LOCK.

'1 '0 all whom it may concern:

Be it known that I, HARRY A. FOOTHORAI, a citizen of the United States of America, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in Register-Locks, of which the following is a specification.

This invention relates to register locks for writing-adding machines and has for its object to provide a simple and effective lock whereby the register of a writing-adding machine may be readily attached to or detached from the register supporting bar and quickly adjusted either to a new position on the bar or in such slight degrees as may be necessary to cause a proper alinement of the register and its operating mechanism.

In the accompanying drawings Figure 1 is a perspective view of a register base equipped with my improved lock and attached to the register supporting bar, the major portion of the register being in dicated in dotted lines.

Fig. 2 is a plan view of the subject-matter of Fig. 1.

Fig. 3 is a longitudinal sectional view through the register base and lock, the unlocked or retracted position of the register bar being indicated in dotted lines.

Fig. 4 is a similar section showing the lockingbar retracted and the base in the act of removal from the register bar.

Fig. 5 is a transverse section on the line 55 of Fig. 2.

Fi 6 is a detail perspective view of the rackilock and one of its supporting screws.

' Fig. 7 is a detail perspective view of the locking bar and'its immediately associated parts detached.

Fig.8 is a transverse section on the line 8-8 of Fig. 2, and

Fig. 9 is a sectional view showing the manner in which the knurled head 24" is locked to the locking bar 24.

1 indicates what is known in the art as a register supporting bar which ordinarily extends across the rear of the main frame of a writing-adding machine, more particularly a machine of the Elliott-Fisher type. This bar is of dove-tailed form and is provided at the upper front corner thereof with a rack or series of teeth 2 which may be and preferably are integral with the bar.

Specification of Letters Patent.

Patented Oct. 16, 1917.

Serial No. 606,930.

The bar 1 supports a register 3 which may be located at any point in the length of the bar and is ordinarily operated by a master wheel (not shown) mounted on the movable carriagc of the machine and engaging the number'wheels of the register in a manner well ilnderstood in the art.

The register base 4 is cut to form a bar channel 5 which ordinarily conforms in shape to that of the bar, but in the present instance has its side walls 6 and 7 inclined in the same direction. This form of the channel produces an undercut at one side thereof, but makes its entrance as wide as its bottom so that the register base may be slipped over the bar at any point in its length instead of necessitating the removal of the base by slipping it along the bar to the end thereoflas usual.

In addition to the channel 5 which is formed in the under side of the base 4: said baseis'provided with a cavity 8 opening through the top of the base adjacent to its front end and adapted for the reception of a rack block 9 having teeth 10 designed to engage the rack 2 of the register bar. The block 9 is provided with trunnions 11 which extend into sockets 12 formed in the inner ends of a pair of bearing screws 13 screwed into horizontal openings '14 extending into the cavity 8 from the opposite sides of the base, see Fig. 5. By means of the screws 13 slight lateral adjustment of the register 3 relative to the rack block 9 is permitted in order to facilitate the accurate alinement of the register and its operating mechanism. This provision for slight adjustment of the block 9 obviates the necessity for absolute accuracy in cutting the teeth 2 on the register bar and this materiallycheapens the cost of production. It is also desirable to allow slight play of the block 9 in order to accommodate any slight irregularities of the teeth and this condition is met by making the sockets 12 of sufiicient dimensions and placing in rear of the block a leaf spring 15 seated against the wall of the recess 8 and tending to urge the block 9 rearwardly or toward the rack 2.

At the rear side of the register bar channel 5 the under side of the base is cut out to form a transversely dove-tailed longitudinal channel 16 for a dove-tailed locking bar 17. The bar 17 is mounted to slide longitudinally in the channel 16 and is provided with an inclined end 18 designed to be urged against'one side of the bar 1 to retain the register against vertical movement relative to the bar and to draw the rack block 9 into close engagement with the rack 2, it being understood of course that the toothed portion of the rack block extends into-the cavity 5. The locking bar or s lide 17 ispernntted considerable longitudinal movement hunted by a stop pin 19 depending from the .base 4 and accommodated .in a longitudinal slot 20 inth uppers de' of. the bar 17. The p n 19 alspfserves forthe attachment of one end ,of ,a .leckin bar retr ct g p ng 2 th Qpi' s t en pi h ets agai st an e ment carriedby the her 17 and'tends to move the. bi lto its retracted PQ L Q Shown ing-,4-

Infldditionto this limited movement of the lock n ba wh c is nt d t p sentitto or withdraw it from ,the register bar, it is desirable to provide means whereby, when the .barhas been moved forward to its engaging position, said bar may e urged with great force, or .crampcd,.securely against the register bar to insure the rigid retention of the register ;ther eon. For this purpose the bar 1.7 is providedadjacent to its rear end .with a transverse cavity 22 designed to accommodates Wing 23 fixed-to the inner end of a shaft 24 afiordeda hearing in the barl'? andprovlded beyond the rear end of saidhar with a knurled head 24. The parts are so proportioned thatthe W g 23 may be. turned down flushwith or below .the upper surface of the bar 17 so as to present no obstruction ,tothe slidingmovement of the latter.' \Vhen, however, the locking bar is pushed forward into approximate engagement with the register .bar 1, the wing is brought under or,opp osite an inclined or cam slot 25 disposed transversely f th ase, as cl arlyshown in Fig. 2. Since the Wing 23 swings .on an .axis disposed longitudinally of :the locking bar and since the cam slot 25 is disposed at a slight transverse angle, it is obvious that as the wing enters one end of the slot and travels toward the other, it ust necessarily ap- .ment of the bar. This further. movement ofthe 'lockinghar afterit has been shoved against the. register bar, produces the crampng orrigid looking action necessary to 111- sure the. absolutely rigid retention of the register by itssupporting bar,

Attention isnow directed to the fact that .whilethe rack block 9 andthe locking bar 17 coact. each is useful independently of the other. sincethe locking bar, alone con- 3 stit'utes an efficient form of clamp in con junction with the opposite wall of the channel 5 and the advantages of the rack block are notdependent upon the specific mechanism employed to draw said block into intimate relation with the rack of the register bar.

Theouter end of the locking bar 24 is threaded as shown at 24*, to receive the knurled head 24* which, when secured to its proper position thereon, is locked by saidscrew 24.

This provision of means for adjusting the head24" on the bar 24 not only facilitates the proper location of the concting parts in the initial assemblage of the device but also facilitates a readjustment which may be desired to compensate for slight wear of the camlning surfaces.

It is thought that from the foregoing, the construction and arrangement of my register lock will be clearly understood, but I wish to reserve the right to efi'ect such modifications of. the illustrated structure as may come fairh within the scope of the protection prayed.

\Vhat I claim is 1. The-combination with a base formed ,to receive a supporting bar, of a locking-bar movably mounted in the base and a camming device carried by the locking .bar and coacting with the base to urge the locking bar in one direction.

2. The combination with .a base of a locking bar slidably mounted therein, a spring tending .to urge the locking bar in one direction and :1 camming device for urging the bar 11 the opposite direction.

3. The combination with a base ofa locking bur slidably mounted in (he base, a spring Lending to urge the locking bar from its engaging position and a camniingrlevicc operative to cam the locking bar in the opposite direction, whereby the spring. will urge the locking bar from its engaging position, and wherebv the cannning device will impart slight additional movement in the opposite direction to the locking bar after said, bar has been moved to its engaging position in opposition to the spring.

4. The combination with a base and a locking bar slidably engaged, of a head ,carried by the locking bar and serving as a handle to slidethc same to and from its engaging position, an;d a cumming device operated .by the head to earn the locking bar slightly after the same has reached its engaging position.

. 5. The combination with a haseand a1ock 111g bar slidably engaged, of a rotary cam- .nuns deyice-serving asa m an fior. sliding the locklng bar to and from its engaging pos tion, and operative to cam the locking anshghtly when the same has reached its p iti f encasement 6. The combination with a base, of a rack bar adapted to support the base, a rack block carried by the base to engage the rack bar, means for adjusting the rack block transversely of the base, and means carried by the base and operative to draw the rack block into engagement with the rack bar.

7. The combination with a rack bar and base, of a rack block adjustably carried by the base, a locking bar also carried by the base and engaging the rack bar, and means for camming the locking bar in one direction to draw the rack block into engagement with the rack bar.

8. The combination with a base and a looking bar slidably engaged, one of said members having a transversely disposed cam slot, of a rotary camming device carried by the other of said members, and movable in the cam slot to cam the locking bar to its engaging position.

9. The combination with a base having a bar channel with parallel inclined side walls, of a supporting bar received by the bar channel and having oppositely inclined side walls, and a locking bar movably carried by the base and having its engaging end inclined to conform to the adjacent side of the supportng bar, whereby the base will be rigidly retained on the supporting bar, but may be lifted therefrom upon retraction of the locking bar.

10. The combination with a base, of a locking bar slidably mounted therein, a spring tending to move the locking bar longitudinally, and a camlning device also operative to move the locking bar longitudinally.

11. The combination with a base having a cam slot, of a locking bar slidably mounted in the base, a spring tending to urge the lockingbar in one direction, and a rotary element carried by the bar and having a wing coacting with the cam slot of the base to urge the bar in the opposite direction.

12. The combination with a base provided Copies of with a channel for the reception of a bar, of a rack block, and a locking bar mounted in the base at opposite sides of the channel.

13. The combination with a base and a bar having teeth, of a rack block mounted in the base to engage said teeth, and means for effecting relative lateral adjustment of the rack block and base.

14. The combination with a base, of a rack block mounted therein, and adjustable retaining means for the block.

15. The combination with a base, of a rack block having trunnions, a pair of adjusting screws mounted in the base and engaging said trunnions, and a spring bearing on the rack block and tending to urge the same toward its engaging position.

16. The combination with a base, of a locking bar carried thereby, a camming device for cumming the locking bar to its engaging position, an operating head for said camming device, and means for locking the head to the camming device.

17. The combination with a base, of a locking bar slidably mounted therein and a rotary member carried by the locking bar and coacting with the locking bar and the base to urge the locking bar longitudinally when said member is rotated.

18. The combination with a base, of alocking bar slidably mounted therein, a rotary member carried by the locking bar and coacting with the locking bar and the base to urge the locking bar longitudinally when said member is rotated, a head adjustable on the rotary member, and means for locking the head to the rotary member in the various positions of adjustment of said head.

In testimony whereof I aliix my signature in presence of two witnesses.

HARRY A. FOOTHORAP.

Witnesses:

J. F. CULVERWELL, R. M. PARKER.

this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G." 

